作业

# class Person:
#     def __init__(self, name, ad, hp):
#         self.name = name
#         self.ad = ad
#         self.hp = hp
#
#     def attack(self, p):
#         p.hp -= self.ad
#         print("%s 打了%s，%s掉了%s的血，还剩下%s的血" %(self.name, p.name, p.name, self.ad, p.hp))
#
#     def aragment_weapon(self, wea):
#         self.wea = wea
#         self.ad += wea.ad
#
#     def add_moto(self, moto):
#         self.moto = moto
#         self.ad += moto.ad
#
#     def road_rush(self, p1):
#         p1.hp = p1.hp - self.ad
#         print("%s骑着%s打了骑着%s的%s，%s哭了，还剩下%s的血" %(self.name, self.moto.name, p1.moto.name, p1.name, p1.name, p1.hp))
#
#
#
# class Weapon:
#     def __init__(self, name, ad):
#         self.name = name
#         self.ad =ad
#
#     def fight(self, p1, p2):
#         p2.hp -= (self.ad + p1.ad)
#         # print("%s利用了%s打了%s--%s%s还剩下%s的血" %(p1.name, self.name, p2.name,self.name, p2.name, p2.hp))
#         print("{0}利用了{1}打了{2}--{1},{2}还剩下{3}的血".format(p1.name, self.name, p2.name,p2.hp))
#
#
# class Moto:
#     def __init__(self,name,ad):
#         self.name = name
#         self.ad = ad
#
# m1 = Moto("宝马", 10)
# m2 = Moto("自行车", 5)
#
# js = Person("剑圣", 50, 200)
# gl = Person("盖伦", 20, 300)
# yx = Weapon("樱雪", 20)
# sj = Weapon("圣剑", 10)
#
# # gl.attack(js)
# # gl.attack(js)
# # js.attack(gl)
# # js.attack(gl)
# # js.attack(gl)
# js.aragment_weapon(yx)  # 组合，给js对象封装了一个属性，属性值为yx这个对象
# js.aragment_weapon(sj)
# js.add_moto(m1)
# gl.add_moto(m2)
# # js.wea.fight(js, gl)
# print(js.ad)
# js.road_rush(gl)
# gl.aragment_weapon(sj)
# # gl.wea.fight(gl,js)

from math import pi
class Circular:
    def __init__(self,r):
        self.r = r

    def perimeter(self):
        return round(2 * pi * self.r, 2)

    def area(self):
        return round(pi * self.r ** 2, 2)

c1 = Circular(2)
print(c1.area())
print(c1.perimeter())


#
# class Ring:
#     def __init__(self,r1,r2):
#         self.r1 = r1
#         self.r2 = r2
#
#     def perimeter(self):
#         return round(2 * pi * (self.r1-self.r2), 2)
#
#     def area(self):
#         return round(pi * self.r1 ** 2 - pi * self.r2 ** 2, 2)
#
# r1 = Ring(6,3)
# print(r1.perimeter())
# print(r1.area())
#
# 组合
class Ring:
    def __init__(self,r1,r2):s
        self.r1 = Circular(r1)
        self.r2 = Circular(r2)

    def area(self):
        return self.r1.area() - self.r2.area()

    def perimeter(self):
        return self.r1.perimeter() - self.r2.perimeter()

r1 = Ring(6,3)
print(r1.perimeter())
print(r1.area())